Dai″sy (–zy̆), n.; pl.Daisies (–zĭz). [OE. dayesye, AS. dæges-eáge day's eye, daisy. See Day, and Eye.] (Bot.) (a) A genus of low herbs (Bellis), belonging to the family Compositæ. The common English and classical daisy is B. perennis, which has a yellow disk and white or pinkish rays. (b) The whiteweed (Chrysanthemum Leucanthemum), the plant commonly called daisy in North America; — called also oxeye daisy. See Whiteweed.
☞ The word daisy is also used for composite plants of other genera, as Erigeron, or fleabane.
Michaelmas daisy(Bot.), any plant of the genus Aster, of which there are many species. — Oxeye daisy(Bot.), the whiteweed. See Daisy (b).